https://forums.steampowered.com/forums/showthread.php?t=2460658
The idea is to mail as many crowbars as possible to Valve, as well as email, facebook, etc. pictures of crowbars.
I’m sure some of you will say it’s retarded, but to me it seems like some good harmless fun and a nice way to remind Valve of what we really want. Half-Life, bitches.